Design of a Compact Dual Port 2 × 1 Ultra-Wideband MIMO Antenna for Radio Frequency Energy Harvesting Based on Four ``A" Shaped Slots

Abstract

Radio frequency energy harvesting (RF-EH), which uses an ultra-wideband (UWB) antenna, is the best substitute for traditional batteries for continuously powering sensor networks.The UWB antenna helps to receive the ambient radio frequency energy that radiates from communication applications for harvesting purposes to power devices or recharge batteries.A novel aspect of this design is the use of dual antenna ports with four "A" shaped slots in radiating patches and ground plane, which permits the harvester to completely utilize all accessible frequency bands.The design analysis of a compact dual-port (2 × 1) ultra-wideband multiple-input multiple-output (UWB-MIMO) antenna based on four "A" shaped slots and shared ground plane in the band of 2.3-21.7 GHz is presented.The proposed antenna has been implemented on a Rogers RT 5880 substrate with a size of 39 mm × 30 mm, a thickness of 0.8 mm, and a dielectric constant of 2.2.It achieves S11 ≤ -10 dB at (2.3-21.7)GHz and a maximum peak gain of 10.29 dB at 20.53 GHz.The proposed antenna is designed and simulated with ANSYS HFSS and fabricated.The results of simulation and measurement of the proposed antenna are in good agreement, and the antenna achieves bandwidth of 2.3-20 GHz that supports radio frequency energy harvesting in addition to UWB applications across satellite, Wi-Fi, Wi-Max, and mobile applications.